The head of India's ruling Congress Party, Sonia Gandhi is expected to regain the parliamentary seat she gave up during a high-profile political scandal.
Reports from India say, Gandhi has little competition and is likely to win the special election held on Monday in Rae Bareli in the Utter Pradesh state. In March, she stepped down as a member of the lower house and head of the government's National Advisory Council, following charges that she violated the constitution by holding two paid positions.
Meanwhile, voters across India are braving the intense summer heat to cast votes in other state assembly elections.
In the eastern state of West Bengal, the turnout was reported to be heavy in the last phase of voting Monday.
A high voter turnout has also been reported for the southern state of Tamil Nadu.